Reversing-gear for internal-combustion engines.



R. LNDOLT. NEvERslNG GEAR Foa INTERNAL coNBusnoN ENGINES. APPUCATION FlLED AUG.28.19|3. KENEWED MAY 5.1915. Llql, Patented Deo. 7, 1915 2 SHEETS-SHEET 1.

R. LANDOLT.

REVERSING GEAR FOR INTERNALCOMBUSTION ENGINES.

APPLICATION FILED AUG.28, I9l3. RENEWED MAY 5 i915.

Patented. Dec. 7, 1915.

Mmm,

2 `SHEETS-SHEET 2.

RODOLPHE LANDOLT, OF ZUR-ICH, SWITZERLAND, ASSIGNOR TO BUSCH-SULZER BROQZ F ST. LOUIS, MISSOURI, A CORPORATIDN 0F Mis REVERSING-GEAR FOR INTERNA-CGMBUSTION ENGINS.

Application :filed August 28, 1913, Serial No. 787,066.

To all whom it may concern:

Be it known that I, RoDoLr-i'n LANDOLT, a citizen of the Republic of Switzerland, residing at Zurich, Switzerland, have invented certain new and useful. improvements in Reversing- Gear for Internal Combustion Engines, of true, and complete specification.

The invention concerns a reversing ar rangement for internal combustion engines and especially for the multiple cylinder type for purposes of locomotion, whereby a' special mechanism is provided by means of 'which the engines may work in the ahead or astern direction, while a second" mechanism controls the valve gear for starting, Working and stop. This type of engine is usually started-by means of compressed air and afterward by a continuous movement 2G gradually switched on to oilv for normal working. In this way it can easily happen `that in consequence of the inattention or a mistake on the part of the engine driver, the operations for reversing may be carried out falsely, that is to say before the air or the fuel has been shut od. This arrangementhasl considerable disadvantages.

The present invention overcomes these disadvantages in providing a special control by means of which the mechanism for ahead or astern working and the` mechanism for starting, running and stop are so interconnected that the formercan only be operated when the latter is in the stop position. $5 In the drawings, Figure l is a front elevaltion of a reversing engine control device; Fig. 2 is ay section thereof; Fig. 3 a detail of the bolt.; and Fig. el; an indication of the combination of th device with lthelengine j parts controlled by it.

j( A is/the handwhfeel by means of which the if valve gear is operatedfor the starting with air running and stop positions (valve :gear I).

B isv thefreversing lever by means of which the engines are set to run ahead or astern .(valve gear Il).

` r On the-spindle of the hand-wheel A a pinion C 1s mounted which drives vthe spur wheel D. The forward part of the wheel. D is turned cylindrical and lprovided with the slots o in which the rollers :r operate. The rollers r are mounted on the end of the bolts b, the movement of which is guided Specification of Letters Patent.

which the following is a full,

Patented Dec. f?, i915..

Renewed May 5, 1915. Serial No. 26,138. in the main casting K. The length of these bolts is such, that when the rollers 1' do not rest in the slots fz, their other ends project beyond the outside surface of K, that is to say, when the gear fuel (valve gear I) is not 'in the stop position. In Fig. l the stop position is further indicated by means of the pointer s fixed on the wheel D which comes exactly opposite the pointer 29 fixed on the casting K.'

lVhen the bolts Z) do not project, the reversing lever B may be moved from the ahead position V in the direction of the arrow into the astern position R. Should 'the hand-wheel A be revolved either right or left, that is to say to admit the air or fuel, the wheel D will likewise be revolved, and the rollers 7' will be operated by the smooth circular surface D of D, so that the points of the bolts Z) will protrude and prevent the reversinglever B being affain revolved into the opposite position. nbthis way the lever for they ahead and astern directions` is controlled so long as the mechanism operating the air and fuel is not in the neutral or stop position. The engine driver can therefore on reversing make no mistake. These two mechanisms are further capable of being operated by meansof auxiliary engines.

The valve gears I and Il" are merely indicated in the drawings because methods and means .for setting valve-operating elements for forward or reverse running, and also for air or combustion operation and stopping, are well-known and form no part of the novelty of the invention. Briefly, the shaft l, to which the lever B is secured, operates one or more connections 2 and 3, of which the connection 3 may shift the eccentric fulcrum of the fuel valves in the known manner to cause them to open at the proper times for running in one direction orthe other, while the'connection 2 may effect the shifting of any other element which it may be desirable to adjust in connection with the reversing operation. The hollow shaft 5, to which the wheel D is united and which surrounds the shaft l, is shown provided with a pair of disk-form function camgrooves 9 and 10, one adapted to govern ne group of the engine cylinders through con- 'nectlons 9a and the other to govern another group through connections 10a. As to these elements, therefore, the drawings are merely for operating the air or' and combustion reference index for controllingy the said locking means.

indicative ofy suitable connections whereby turning;V of the hand wheel A from a position in whichboth the air starting; and the fuel valves are out of action brings first the starting valves into operation, and then, in proper sequence, renders these valves inoperative and causes the corresponding fuel valves to `perform their functions. Restoration of the hand wheel. to the original position safely cuts olf both starting air and fuel, and it is this position of part A which permits operation of the hand lever B, as already set forth. 1 l

What is claimed as new is:

l. ln a reversible internal combustion engine, two independently operable mechanisms, one controlling the reversing and the other controlling air starting, combustion running and stopping of the engine, and means whereby the former mechanism can be operated only when the latter is in the stop position.

2. controlv gines comprising` a air starting and fuel valves, a pendently operable device serving` to set the engine for reverse y running, a blocking; means for the latter device, and means whereby the rst device sets the blocking means in operative position while the starting or fuel valves are in operation.

A eontroldevice of the kind described comprising` a reversing` shaft, a starting and combustion-controlling shaft, a gear through which the same is rotated, means for blocking the reversing shaft, and means on. such gear for operating the said means.

4t. A control device of the kind described, comprising' a reversing' haft and means therefor, a startinp; and combustion device for combustion endevice for 'controlling the second inde- 4controlling` shaft, said shafts being indea part on said starting` pendently operable,

controlling; shaft bearing a therefor, and means on such part A control device of the kind described, comprising a starting` and combustion controlling" shaft, a gear thereon and an actuating pinion for `such gear through which it may be manually rotated, in combination with a reversing;l shaft, means for blocking locking y other.

7. A control device of the kind described comprising two control shafts, one of which surrounds the other, a rotating member on the enter shaft through which it is operated, and means on said member for preventing operation of the other shaft.

, 8. )i control device ofthe kind described comprising a easing bearing a reference index, a pinion therein, a gear driven by the pinion and bearing a reference index exposed to view from the exterior of the casing, a control-shaft operated by the said gear, a second control shaft, and means for locking the same controlled by the position of the said gear.

9. A control device of the kind described, comprisinga control shaft, a ,tubular control shaft surrounding it, a manual operating handle in the inner shaft, a concentric gear on the tubular shaft, and a manually operated pinion for rot-ating the gear, in combination with means operated with one of said shafts for preventing operation of the other.

10. ln a reversible internal combustion engine, the combination of a reversing device, a second mechanism controllingair starting, combustion running and stopping of the engine, and stops operative in a plane perpendicular to the axis of the reversing device and controlled by saidsecond mechani sm so as to block the path of the reversing device when the second mechanism is in starting' or working position.

ln testimony whereof, I have signed this specification in the presence of two witnesses.

RoDoLrHn LANDOLT.

Vitnesses:

CARL Groene, y Boone AMES. BURNS. 

